<template>
  <div class="app-container">
    <el-form :model="queryParams" ref="queryForm" size="small" :inline="true" v-show="showSearch" label-width="68px">
      <el-form-item label="课程名" prop="name">
        <el-input
            v-model="queryParams.name"
            placeholder="请输入课程名"
            clearable
            @keyup.enter.native="handleQuery"
        />
      </el-form-item>
      <el-form-item label="课程号" prop="no">
        <el-input
            v-model="queryParams.no"
            placeholder="请输入课程号"
            clearable
            @keyup.enter.native="handleQuery"
        />
      </el-form-item>
      <el-form-item label="授课教师" prop="teacher">
        <el-select
            v-model="queryParams.userId"
            placeholder="请选择教师"
            @keyup.enter.native="handleQuery"
            clearable
        >
          <el-option v-for="item of teachers" :key="item.id" :value="item.id" :label="item.name"/>
        </el-select>
      </el-form-item>
      <el-form-item>
        <el-button type="primary" icon="el-icon-search" size="mini" @click="handleQuery">搜索</el-button>
        <el-button icon="el-icon-refresh" size="mini" @click="resetQuery">重置</el-button>
      </el-form-item>
    </el-form>

    <el-row :gutter="10" class="mb8">
      <el-col :span="1.5">
        <el-button
            type="primary"
            plain
            icon="el-icon-plus"
            size="mini"
            @click="handleAdd"
            v-hasPermi="['gigi.course:course:add']"
        >新增
        </el-button>
      </el-col>
      <el-col :span="1.5">
        <el-button
            type="success"
            plain
            icon="el-icon-edit"
            size="mini"
            :disabled="single"
            @click="handleUpdate"
            v-hasPermi="['gigi.course:course:edit']"
        >修改
        </el-button>
      </el-col>
      <el-col :span="1.5">
        <el-button
            type="danger"
            plain
            icon="el-icon-delete"
            size="mini"
            :disabled="multiple"
            @click="handleDelete"
            v-hasPermi="['gigi.course:course:remove']"
        >删除
        </el-button>
      </el-col>
      <right-toolbar :showSearch.sync="showSearch" @queryTable="getList"></right-toolbar>
    </el-row>

    <el-table v-loading="loading" :data="courseList" @selection-change="handleSelectionChange">
      <el-table-column type="selection" width="55" align="center"/>
      <el-table-column label="授课教师" align="center" prop="userName"/>
      <el-table-column label="课程名" align="center" prop="name"/>
      <el-table-column label="课程号" align="center" prop="no"/>
      <el-table-column label="授课班级" align="center" prop="className"/>
      <el-table-column label="操作" align="center" class-name="small-padding fixed-width">
        <template slot-scope="scope">
          <el-button
              size="mini"
              type="text"
              icon="el-icon-edit"
              @click="handleUpdate(scope.row)"
              v-hasPermi="['gigi.course:course:edit']"
          >修改
          </el-button>
          <el-button
              size="mini"
              type="text"
              icon="el-icon-delete"
              @click="handleDelete(scope.row)"
              v-hasPermi="['gigi.course:course:remove']"
          >删除
          </el-button>
        </template>
      </el-table-column>
    </el-table>

    <pagination
        v-show="total>0"
        :total="total"
        :page.sync="queryParams.pageNum"
        :limit.sync="queryParams.pageSize"
        @pagination="getList"
    />

    <!-- 添加或修改课程管理对话框 -->
    <el-dialog :title="title" :visible.sync="open" width="500px" append-to-body>
      <el-form ref="form" :model="form" :rules="rules" label-width="80px">
        <el-form-item label="课程名" prop="name">
          <el-input v-model="form.name" placeholder="请输入课程名"/>
        </el-form-item>
        <el-form-item label="课程号" prop="no">
          <el-input :disabled="disable" v-model="form.no" placeholder="请输入课程号-6位"/>
        </el-form-item>
        <el-form-item label="授课班级" prop="classesId">
          <el-select
              v-model="form.classesId"
              placeholder="请选择班级"
              multiple
              style="width: 100%"
          >
            <el-option v-for="item of classes" :key="item.id" :value="item.id" :label="item.name"/>
          </el-select>
        </el-form-item>
        <el-form-item label="授课教师" prop="userId">
          <el-select
              v-model="form.userId"
              placeholder="请选择教师"
              style="width: 100%"
          >
            <el-option v-for="item of teachers" :key="item.id" :value="item.id" :label="item.name"/>
          </el-select>
        </el-form-item>
      </el-form>
      <div slot="footer" class="dialog-footer">
        <el-button type="primary" @click="submitForm">确 定</el-button>
        <el-button @click="cancel">取 消</el-button>
      </div>
    </el-dialog>
  </div>
</template>

<script>
import {addCourse, delCourse, getCourse, listCourse, updateCourse} from "@/api/gigi.course/course";
import {listUser} from "@/api/gigi.user/user";
import {listClass} from "@/api/gigi.gigi_class/class";

export default {
  name: "Course",
  data() {
    return {
      classes: [],
      teachers: [],
      // 遮罩层
      loading: true,
      // 选中数组
      ids: [],
      // 非单个禁用
      single: true,
      // 非多个禁用
      multiple: true,
      // 显示搜索条件
      showSearch: true,
      // 总条数
      total: 0,
      // 课程管理表格数据
      courseList: [],
      // 弹出层标题
      title: "",
      // 是否显示弹出层
      open: false,
      // 查询参数
      queryParams: {
        pageNum: 1,
        pageSize: 10,
        name: null,
        no: null,
        pic: null,
        classId: null,
        userId: null
      },
      // 表单参数
      form: {},
      // 表单校验
      rules: {
        name: [
          {required: true, message: "课程名不能为空", trigger: "blur"}
        ],
        no: [
          {required: true, message: "课程号不能为空", trigger: "blur"},
          {min:6, max:6, message: "课程号必须6位"}
        ],
        classesId: [
          { type: 'array', required: true, message: '至少选择一个班级', trigger: "change"}
        ],
        userId: [
          {required: true, message: "教师不能为空", trigger: "change"}
        ],
      },
      disable: false,
    };
  },
  created() {
    this.getTeachers();
    this.getList();
  },
  methods: {
    getTeachers() {
      listUser({
            pageNum: 1,
            pageSize: 100,
            type: 0,
            no: null,
            name: null,
            phone: null,
            password: null,
            pic: null
          }
      ).then(response => {
        this.teachers = response.rows;
      });
    },
    getClasses() {
      listClass({
        pageNum: 1,
        pageSize: 100,
        name: null,
        count: null,
      }).then(response => {
        this.classes = response.rows;
      });
    },
    /** 查询课程管理列表 */
    getList() {
      this.loading = true;
      listCourse(this.queryParams).then(response => {
        this.courseList = response.rows;
        this.total = response.total;
        this.loading = false;
      });
    },
    // 取消按钮
    cancel() {
      this.open = false;
      this.reset();
    },
    // 表单重置
    reset() {
      this.form = {
        id: null,
        name: null,
        no: null,
        pic: null,
        classId: null,
        userId: null,
        flag: null,
        classesId: []
      };
      this.resetForm("form");
    },
    /** 搜索按钮操作 */
    handleQuery() {
      this.queryParams.pageNum = 1;
      this.getList();
    },
    /** 重置按钮操作 */
    resetQuery() {
      this.resetForm("queryForm");
      this.handleQuery();
    },
    // 多选框选中数据
    handleSelectionChange(selection) {
      this.ids = selection.map(item => item.id)
      this.single = selection.length !== 1
      this.multiple = !selection.length
    },
    /** 新增按钮操作 */
    handleAdd() {
      this.getClasses();
      this.disable = false;
      this.reset();
      this.open = true;
      this.title = "添加课程管理";
    },
    /** 修改按钮操作 */
    handleUpdate(row) {
      this.getClasses();
      this.disable = true;
      this.reset();
      const id = row.id || this.ids
      getCourse(id).then(response => {
        this.form = {
          ...response.data,
          no: String(response.data.no)
        };
        this.open = true;
        this.title = "修改课程管理";
      });
    },
    /** 提交按钮 */
    submitForm() {
      this.$refs["form"].validate(valid => {
        if (valid) {
          if (!Number(this.form.no)) {
            this.$modal.msgError("课程号必须是数字");
            return;
          }
          if (this.form.id != null) {
            updateCourse(this.form).then(response => {
              this.$modal.msgSuccess("修改成功");
              this.open = false;
              this.getList();
            });
          } else {
            addCourse(this.form).then(response => {
              this.$modal.msgSuccess("新增成功");
              this.open = false;
              this.getList();
            });
          }
        }
      });
    },
    /** 删除按钮操作 */
    handleDelete(row) {
      const ids = row.id || this.ids;
      this.$modal.confirm('是否确认删除课程管理编号为"' + ids + '"的数据项？').then(function () {
        return delCourse(ids);
      }).then(() => {
        this.getList();
        this.$modal.msgSuccess("删除成功");
      }).catch(() => {
      });
    },
    /** 导出按钮操作 */
    handleExport() {
      this.download('gigi.course/course/export', {
        ...this.queryParams
      }, `course_${new Date().getTime()}.xlsx`)
    }
  }
};
</script>
